Senior Frontend Developer (React.js)

Remote; San Francisco (CA); Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

On-time payments

Flexible hours

24 flex days off

Remote work

Job summary

Proxify is seeking a Senior Frontend Developer (React.js) to lead architecture, optimization, and scaling of client web applications. You will transform designs into interactive, modular experiences and work with cross-functional teams.

The role requires 5+ years of engineering, deep React/TypeScript experience, SSR/SSG, and a focus on performance, accessibility, and testing. This is a fully remote, long-term opportunity with competitive compensation.

Qualifications

• 5+ years of professional engineering experience, with 3+ years focused deeply on building scale-ready applications with React.js and TypeScript.
• Expert-level understanding of state management ecosystems, knowing exactly when to utilize global tools (Redux Toolkit, Zustand) versus server-cache managers (React Query/TanStack Query) and native Context.
• Deep familiarity with modern React frameworks, specifically Next.js, including a strong functional understanding of Server-Side Rendering (SSR), Static Site Generation (SSG), and React Server Components (RSC).
• Proven track record of identifying and fixing web performance bottlenecks—handling layout shifts (CLS), minimizing bundle sizes via code-splitting, optimizing re-renders, and mastering Core Web Vitals.
• A strong commitment to automated testing, utilizing tools like Jest, React Testing Library, and Cypress/Playwright to maintain high regression confidence.
• Exceptional eye for UI polish and layout implementation, with a solid commitment to semantic HTML and web accessibility standards (WCAG/ARIA).

Responsibilities

• Design and develop scalable, reusable, and secure component architectures and custom React hooks that accelerate overall development speed.
• Audit and refactor legacy code blocks to optimize Core Web Vitals, payload sizes, and client-side rendering pipelines.
• Interface directly with Backend and Product teams to define clean REST or GraphQL API schemas, ensuring efficient data orchestration.
• Lead by example through rigorous code reviews, driving typing standards, linting rules, and design pattern uniformity across the team.
• Act as an internal sounding board for modern frontend tooling, assisting junior and mid-level developers in refining their React and engineering skills.

Skills

React.js

TypeScript

Redux Toolkit

Zustand

Next.js

SSR/SSG/RSC

Performance optimization

Jest

Cypress/Playwright

WCAG/ARIA

Tools

React Query

TanStack Query

Tailwind CSS

CSS Modules

Turborepo

Nx

Job description

About us:

Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction.

Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfil their dreams and objectives.

Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.

The Mission

We are looking for a Senior Frontend Developer (React.js) on behalf of one of our high-growth client teams to lead the architecture, optimization, and scaling of their user-facing web applications. In this role, you will be responsible for transforming complex product designs into highly interactive, modular, and pixel-perfect digital experiences. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products.

What We Are Looking For

• 5+ years of professional engineering experience, with 3+ years focused deeply on building scale-ready applications with React.js and TypeScript.
• Expert-level understanding of state management ecosystems, knowing exactly when to utilize global tools (Redux Toolkit, Zustand) versus server-cache managers (React Query/ZandStack Query) and native Context.
• Deep familiarity with modern React frameworks, specifically Next.js, including a strong functional understanding of Server-Side Rendering (SSR), Static Site Generation (SSG), and React Server Components (RSC).
• Proven track record of identifying and fixing web performance bottlenecks—handling layout shifts (CLS), minimizing bundle sizes via code-splitting, optimizing re-renders, and mastering Core Web Vitals.
• A strong commitment to automated testing, utilizing tools like Jest, React Testing Library, and Cypress/Playwright to maintain high regression confidence.
• Exceptional eye for UI polish and layout implementation, with a solid commitment to semantic HTML and web accessibility standards (WCAG/ARIA).

Nice-to-Have & Plus Skills

• Experience with monorepo setups (Turborepo, Nx) or distributed micro-frontend architectures.
• Exposure to modern CSS paradigms (Tailwind CSS, CSS Modules) and managing enterprise-grade design systems.
• Background in backend integration, web sockets, or serverless functions (Node.js).
• Familiarity with continuous integration and continuous deployment pipelines (CI/CD) for single-page applications.

Key Responsibilities

• Design and develop scalable, reusable, and secure component architectures and custom React hooks that accelerate overall development speed.
• Audit and refactor legacy code blocks to optimize Core Web Vitals, payload sizes, and client-side rendering pipelines.
• Interface directly with Backend and Product teams to define clean REST or GraphQL API schemas, ensuring efficient data orchestration.
• Lead by example through rigorous code reviews, driving typing standards, linting rules, and design pattern uniformity across the team.
• Act as an internal sounding board for modern frontend tooling, assisting junior and mid-level developers in refining their React and engineering skills.

What we offer:

Get paid, not played

No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

Predictable project hours

Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.

Flex days, so you can recharge

Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.

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Hand-picked opportunities, just for you

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One seamless process, multiple opportunities

A one-time contracting process for endless opportunities, with no extra assessments.

Compensation

Enjoy the same pay, every month with positions landed through Proxify.